SEISMODYNAMICS OF AN UNDERGROUND PIPELINE UNDER NONIDEAL CONTACT WITH GROUND: EFFECT OF SLIP
M. Sh. Israilov1, B. Mardonov2, T. R. Rashidov3
1Research Institute of Mathematical Physics and Seismodynamics of Chechen State University, Grozny, 364051, Russia
2Tashkent Institute of Textile Industry, Tashkent, 100100, Uzbekistan
3Urazbaev Institute of Mechanics and Earthquake Engineering, Tashkent, 100125, Uzbekistan
Keywords: сейсмические колебания и волны, подземный трубопровод, динамические напряжения, seismic waves, underground pipeline, dynamic stress
Abstract
The previously proposed method of one-dimensional deformation of soil is used to solve the problems of joint seismic vibrations of an underground pipeline and elastic soil under nonideal contact under the assumption that there is slip on the contact surface and that resulting shear stresses on it are proportional either to the relative displacement of soil particles and pipeline or to the relative speed of motion movement. The dependence of the maximum stress in the pipeline on the coefficients under boundary conditions is investigated. For supersonic flow around the pipe, resonance is observed with decreasing shear stress on the contact surface.
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